The Texas Instruments BQ34Z100PWR-G1 is a battery monitor IC from the Impedance Track™ series, designed for multi-chemistry fuel gauging across Li-ion, LiFePO4, lead-acid, and other chemistries. It communicates over HDQ or I²C, making it adaptable to most battery management system (BMS) host controllers.
Multi-Chemistry fuel gauging — one BOM for several battery types
The multi-chemistry capability means this gauge can be programmed for different cell types without a hardware change. For a buyer managing a family of products that use Li-ion packs in one SKU and lead-acid in another, the same BQ34Z100PWR-G1 footprint covers both — just a firmware configuration difference. That simplifies qualification and inventory.
HDQ and I²C — two-wire flexibility for the BMS bus
Supporting both HDQ and I²C on the same pins means the gauge can drop into designs already committed to either protocol. For a repair or retrofit scenario, this dual-protocol support is often the deciding factor over a single-interface gauge.
For a procurement team qualifying a new BMS line, this is the cleanest sourcing posture available.
Package and assembly — standard 14-TSSOP
Housed in a 14-TSSOP (0.173", 4.40 mm width) surface-mount package, this gauge uses a common footprint that is easy to route on a two-layer battery-pack PCB. No thermal pad or exposed paddle — standard reflow profiles apply. The Tape & Reel and Cut Tape options cover both prototyping and volume assembly.